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arXiv 1507.01778stat.ME
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量化等高线图的不确定性

Quantifying the uncertainty of contour maps

David Bolin, Finn Lindgren

摘要:

等高线图广泛用于显示空间场的估计。等值线图只显示不同级别的固定数量的等值线,而不是显示估计的字段。然而,尽管这些地图的使用无处不在,与它们相关的不确定性却得到了令人惊讶的少量关注。我们得出的统计不确定性,或质量,等高线图的措施,并使用这些来决定适当数量的等高线,这涉及到在估计的空间领域的不确定性。为了在地质统计学和医学成像中的实际使用,构造了计算方法,其可以应用于高斯马尔可夫随机场,并且特别地与用于潜在高斯模型的集成嵌套拉普拉斯近似结合使用。模拟数据和应用程序的温度估计的方法进行了演示。

英文摘要:

Contour maps are widely used to display estimates of spatial fields. Instead of showing the estimated field, a contour map only shows a fixed number of contour lines for different levels. However, despite the ubiquitous use of these maps, the uncertainty associated with them has been given a surprisingly small amount of attention. We derive measures of the statistical uncertainty, or quality, of contour maps, and use these to decide an appropriate number of contour lines, that relates to the uncertainty in the estimated spatial field. For practical use in geostatistics and medical imaging, computational methods are constructed, that can be applied to Gaussian Markov random fields, and in particular be used in combination with integrated nested Laplace approximations for latent Gaussian models. The methods are demonstrated on simulated data and an application to temperature estimation is presented.

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